Dicumyl peroxide pre-dispersion rubber master batch particles and preparation method thereof

A technology of dicumyl peroxide and pre-dispersed master batch is applied in the field of rubber auxiliaries and its preparation, which can solve the problems of loss of active components, difficulty in uniform dispersion, poor compatibility, etc., and achieves guaranteed activity and convenient ingredients. , the effect of stable nature

Inactive Publication Date: 2015-09-16
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional rubber additives are powdery chemicals, and a small number of additives are liquid or solid. Although they can bring great benefits to rubber products and their processing, there are also some shortcomings: (1) and Compared with pre-dispersed masterbatches, the compatibility of traditional rubber additives with rubber is poor, and it is more difficult to disperse evenly into rubber; (2) In order to uniformly disperse traditional rubber additives into rubber, most of the actual operations pass Realize by increasing the mixing time and increasing the mixing temperature, resulting in more energy loss
[0005] DCP is solid at room temperature, and it will melt to produce droplets during mixing, resulting in the loss of active components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition of the dicumyl peroxide pre-dispersed masterbatch of embodiment one is: 45 parts of dicumyl peroxide, 25 parts of EPDM rubber, 12 parts of calcium carbonate, 15 parts of silicon dioxide, stearic acid 3 parts, the preparation method of this master batch, comprises the following steps:

[0019] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0020] (2) Put the rubber carrier into the internal mixer according to the proportion, and mix for 8 minutes under the conditions of temperature 50 ℃ and rotation speed 25 r / min;

[0021] (3) Put dicumyl peroxide, inorganic fillers and processing aids into the internal mixer in step (2), and continue mixing for 8 minutes at a temperature of 50 °C and a speed of 25 r / min. get glue;

[0022] (4) Feed the compound obtained after mixing in step (3) to the extruder, extrude and granulate under the condition that the barrel temperature is 35 °C and the screw...

Embodiment 2

[0024] The composition of the dicumyl peroxide pre-dispersed masterbatch of embodiment two is: 40 parts of dicumyl peroxide, 35 parts of binary ethylene propylene rubber, 15 parts of calcium carbonate, 5 parts of silicon dioxide, stearic acid 5 parts, the preparation method of this master batch, comprises the following steps:

[0025] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0026] (2) Put the rubber carrier into the internal mixer according to the proportion, and knead for 5 min at the temperature of 55 °C and the speed of 25 r / min;

[0027] (3) Put dicumyl peroxide, inorganic fillers and processing aids into the internal mixer in step (2), and continue mixing for 7 minutes at a temperature of 55 °C and a speed of 25 r / min. get glue;

[0028] (4) Feed the compound obtained after mixing in step (3) to the extruder, extrude and granulate under the condition that the barrel temperature is 40°C and the scr...

Embodiment 3

[0030] The composition of the dicumyl peroxide predispersed masterbatch of embodiment three is: 45 parts of dicumyl peroxide, 20 parts of EPDM rubber, 15 parts of binary ethylene propylene rubber, 8 parts of calcium carbonate, clay 6 parts, 6 parts of paraffin, the preparation method of this master batch, comprises the following steps:

[0031] (1) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0032] (2) Put the rubber carrier into the internal mixer according to the proportion, and knead for 5 min at the temperature of 50 °C and the speed of 35 r / min;

[0033] (3) Put dicumyl peroxide, inorganic fillers and processing aids into the internal mixer in step (2), and continue mixing for 5 min at a temperature of 50 °C and a speed of 35 r / min. get glue;

[0034] (4) Feed the compound obtained after mixing in step (3) to the extruder, extrude and granulate under the condition that the barrel temperature is 35°C and t...

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Abstract

The invention discloses dicumyl peroxide pre-dispersion rubber master batch particles. The rubber master batch particles comprise the following components in parts by weight: 30-60 parts of dicumyl peroxide, 20-70 parts of a rubber carrier, 5-30 parts of an inorganic filler and 3-9 parts of processing agents. The invention also discloses a method for preparing the dicumyl peroxide pre-dispersion rubber master batch particles. The method comprises the following steps: preheating an internal mixer to the temperature of 45-60 DEG C, internally mixing the raw materials according to the weight part requirement, uniformly internally mixing, extruding and granulating. The rubber master batch particles prepared by the method disclosed by the invention are easy to prepare and mix and are stable in properties under normal storage conditions, and the active ingredients are not separated out; and moreover, the mixture is high in liquidity, the rubber master batch particles are easy to absorb and uniform to disperse in various rubber, the loss caused by liquid drops formed by melting the dicumyl peroxide during direct mixing is effectively avoided, and the maximum activity of the active ingredient dicumyl peroxide is guaranteed.

Description

technical field [0001] The invention relates to the technical field of rubber additives and its preparation, in particular to a dicumyl peroxide pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] DCP, dicumyl peroxide, is soluble in benzene, cumene, and ether, slightly soluble in cold ethanol, insoluble in water, and is a white transparent diamond-shaped crystal. DCP is mainly used as a vulcanizing agent for natural rubber and synthetic rubber and as an initiator for polymerization reactions, and can also be used as a crosslinking agent for polyethylene resins. [0003] Most of the traditional rubber additives are powdery chemicals, and a small number of additives are liquid or solid. Although they can bring great benefits to rubber products and their processing, there are also some shortcomings: (1) and Compared with pre-dispersed masterbatches, the compatibility of traditional rubber additives with rubber is poor, and it is more diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08L23/16C08L9/00C08L9/02C08L9/06C08K13/02C08K5/14C08K3/26C08K3/36C08K3/34C08K5/09C08J3/22
Inventor 连千荣张安将徐婷谷建鹏王岚
Owner NINGBO ACTMIX POLYMER
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